aged background boxcar decay grunge iron metal oxide oxidized paint peel peeling rivet rivets rust seam steel surface texture weathered abstract blue bridge city connection crossing famous graphic gray green grey impressionism link painting scenery sky span transit construction.finish corroded corrosion corrosive crack cracked crackled cracks oxidise oxidize rusty cog cogs cogwheels crane derrick gears industrial machine machinery pinion spur teeth wheels bunker cold war concrete door door handle Hardware accessory latch lock paint peeled urban wall war wood yellow angles appearance architectural architecture building building-work built cambodia construction danger dangerous external features height heights high metal-work painted pipes railing rails risks risky safety scaffolding steel-scaffolding surfaces tall work workmen ancient damage damaged eroded erosion industry old plate red scrap scrapyard scratch scratched wallpaper weather barrier close clouds color colored detail fence lines peak point rustic secure security spike strong structure drip drips alert area backdrop blank bolt bolts brown copy grungy icon inform information isolated placard plank planks plaque retro risk sign space square triangle white wooden